【判断题】
汽油的抗氧化安定性表示汽油在储存中能够抵抗氧化的能力。
A. 对
B. 错
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既然燃料的饱和蒸气压力,是指在一定温度下燃料饱和蒸气所显示的压力,所以雷德饱和蒸气压测定中,只要控制试验温度为38℃,而不必控制燃料及燃料蒸气的体积,即可得到正确的试验结果。
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用直接电导法测定水的纯度时,水的电导率越高,则水的纯度越高。
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液化石油气铜片腐蚀试验,是将磨光的铜片放入用水饱和的100ml的试样中,在40℃下放置一小时,然后用标准色板比较,以判断其腐蚀等级。
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测量过液化石油气的密度后,必须及时排除圆桶内的液体。
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无论质量控制怎样严格,产品质量总是会有波动的。
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采用内标法进行色谱定量分析时,所选用的内标物的保留值最好在各组分色谱图的中间位置。
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碘值是表示安定性的指标,油品的碘值越高,表明其不饱和烃含量越多,其安定性也越差。
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根据影响产品质量波动的原因,可以把产品质量波动分为正常波动和异常波动两类。
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